TY - JOUR
T1 - Long-term trend of and correlation between vegetation greenness and climate variables in Asia based on satellite data
AU - Lamchin, Munkhnasan
AU - Lee, Woo Kyun
AU - Jeon, Seong Woo
AU - Wang, Sonam Wangyel
AU - Lim, Chul Hee
AU - Song, Cholho
AU - Sung, Minjun
N1 - Funding Information:
We would like to thank the editors and anonymous reviewers for their detailed comments and review, which greatly improved this manuscript. This work was funded by the Korean Ministry of Environment as “Climate Change Correspondence Program” (Project Number: 2014001310008), Korea Meteorological Administration Research and Development Program (See-At grant KMIPA 2015-6140 ), and a Korea University grant .
Publisher Copyright:
© 2018
PY - 2018
Y1 - 2018
N2 - Satellite data has been used to ascertain trends and correlations between climate change and vegetation greenness in Asia. Our study utilized 33-year (1982–2014) AVHRR-GIMMS (Advanced Very High Resolution Radiometer–Global Inventory Modelling and Mapping Studies) NDVI3g and CRU TS (Climatic Research Unit Time Series) climate variable (temperature, rainfall, and potential evapotranspiration) time series. First, we estimated the overall trends for vegetation greenness and climate variables and analyzed trends during summer (April–October), winter (November–March), and the entire year. Second, we carried out correlation and regression analyses to detect correlations between vegetation greenness and climate variables. Our study revealed an increasing trend (0.05–0.28) in temperature in northeastern India (bordering Bhutan), Southeast Bhutan, Yunnan Province of China, Northern Myanmar, Central Cambodia, northern Laos, southern Vietnam, eastern Iran, southern Afghanistan, and southern Pakistan. However, a decreasing trend in temperature (0.00 to −0.04) was noted for specific areas in southern Asia including Central Myanmar and northwestern Thailand and the Guangxi, Southern Gansu, and Shandong provinces of China. The results also indicated an increasing trend for evapotranspiration and air temperature accompanied by a decreasing trend for vegetation greenness and rainfall. Increases in both the mean annual signal and annual cycle occurred in the forest, herbaceous, and cropland areas of India, Northwest China, and eastern Kazakhstan. The temperature was found to be the main driver of the changing vegetation greenness in Kazakhstan, northern Mongolia, Northeast and Central China, North Korea, South Korea, and northern Japan, showing an indirect relationship (R = 0.84–0.96). • Temperature is the main climatic variable affecting vegetation greenness.• A downward trend in vegetation greenness was observed during summer (April–October).• Temperature showed an upward trend across many areas of Asia during the study period.• In winter, rainfall showed downward and upward trends in different parts of Asia.
AB - Satellite data has been used to ascertain trends and correlations between climate change and vegetation greenness in Asia. Our study utilized 33-year (1982–2014) AVHRR-GIMMS (Advanced Very High Resolution Radiometer–Global Inventory Modelling and Mapping Studies) NDVI3g and CRU TS (Climatic Research Unit Time Series) climate variable (temperature, rainfall, and potential evapotranspiration) time series. First, we estimated the overall trends for vegetation greenness and climate variables and analyzed trends during summer (April–October), winter (November–March), and the entire year. Second, we carried out correlation and regression analyses to detect correlations between vegetation greenness and climate variables. Our study revealed an increasing trend (0.05–0.28) in temperature in northeastern India (bordering Bhutan), Southeast Bhutan, Yunnan Province of China, Northern Myanmar, Central Cambodia, northern Laos, southern Vietnam, eastern Iran, southern Afghanistan, and southern Pakistan. However, a decreasing trend in temperature (0.00 to −0.04) was noted for specific areas in southern Asia including Central Myanmar and northwestern Thailand and the Guangxi, Southern Gansu, and Shandong provinces of China. The results also indicated an increasing trend for evapotranspiration and air temperature accompanied by a decreasing trend for vegetation greenness and rainfall. Increases in both the mean annual signal and annual cycle occurred in the forest, herbaceous, and cropland areas of India, Northwest China, and eastern Kazakhstan. The temperature was found to be the main driver of the changing vegetation greenness in Kazakhstan, northern Mongolia, Northeast and Central China, North Korea, South Korea, and northern Japan, showing an indirect relationship (R = 0.84–0.96). • Temperature is the main climatic variable affecting vegetation greenness.• A downward trend in vegetation greenness was observed during summer (April–October).• Temperature showed an upward trend across many areas of Asia during the study period.• In winter, rainfall showed downward and upward trends in different parts of Asia.
KW - Correlation
KW - Evaporation
KW - Precipitation
KW - Statistical analysis
KW - Temperature
KW - Temporal trend analysis
KW - Trend
KW - Vegetation greenness
UR - http://www.scopus.com/inward/record.url?scp=85050943187&partnerID=8YFLogxK
U2 - 10.1016/j.mex.2018.07.006
DO - 10.1016/j.mex.2018.07.006
M3 - Article
AN - SCOPUS:85050943187
SN - 2215-0161
VL - 5
SP - 803
EP - 807
JO - MethodsX
JF - MethodsX
ER -
